package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

//文件复制:将一个文件中的数据放到另一个文件中
public class CopyDemo {
    public static void main(String[] args) throws IOException {
        FileInputStream fis=new FileInputStream("image.jpg");
        FileOutputStream fos=new FileOutputStream("image_cp.jpg");
        long start=System.currentTimeMillis();
        int d;
        while ((d=fis.read())!=-1){
            fos.write(d);
        }
        long end=System.currentTimeMillis();
        System.out.println("复制完毕，耗时:"+(end-start)+"ms");
        fis.close();
        fos.close();



        /*FileInputStream fis=new FileInputStream("image1.jpg");
        FileOutputStream fos=new FileOutputStream("image1_cp.jpg");
        long start=System.currentTimeMillis();
        int d;
        while ((d=fis.read())!=-1){
            fos.write(d);
        }
        long start1=System.currentTimeMillis();
        System.out.println("复制完毕!");
        System.out.println(start1-start);

        fis.close();
        fos.close();

         */
    }
}
